Brochure

Catalog CIC-2003-1/US
Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
443
Industrial Refrigeration Products: Miscellaneous
Industrial
Refrigeration
Products
New Products
Advantages of HRP pumps
1. Unrivalled Safety
In contrast to most common hermetic pumps the stator
housing of HRP pumps is designed to withstand high
nominal pressure. If the motor “stator can” leaks in the
event of an accident, no refrigerant will escape.
2. Good quality liquid delivery
The advanced design of the impeller-guide ring construc-
tion enables the pump to deliver a relatively high amount of
vapor with the liquid flow. This is achieved without inter-
rupting the constant delivery of the liquid. (The liquid
volume flow will of course decrease with the increase of
vapor volume.) In contrast to most other hermetic pumps
the vapor that is generated while cooling the motor is
vented to the discharge side without reducing the pump
capacity.
3. Covering a wide range
All HRP pump models are suitable for the common
refrigerants. The HRP 3232 is also especially designed to
be used with CO
2
as a primary or secondary refrigerant.
Due to the pump performance characteristic curve, each
pump covers a wide range of applications.
4. Simple protection
The built-in temperature cut-out protects the pump against
overheating and must be connected into the control system
with the standard overload protection equipment. It is
recommended to install a pressure differential switch or a
flow switch on the discharge side of the pump.
5. No orifices or degassing lines required
The HRP pumps do not require any Q-max or Q-min
orifices. The internal design of the pump incorporates an
internal pressure equalization that enables the pump to
depressurize quickly to the suction side during standstill,
therefore eliminating the need for additional degassing
lines.
6. Strong construction
The open execution of the impellers applies only small
axial forces. The transformer oil protects the motor against
moisture and provides good thermal conductivity.
7. Proven bearing design
With our extensive experience we have developed an
improved low-wear bearing design. By monitoring the
electrical resistance at the sensor contact, it is possible to
detect for bearing wear while pump is at standstill.
Hermetic Refrigerant Pumps
8. Low maintenance
When the correct installation instructions are observed and
carried out the pump will run for many trouble-free years
without requiring maintenance. The strong conical filter in
the pump suction inlet should be checked after commis-
sioning. Note no other filters in the suction pipework are
required. In the event of the pump filling with oil, it can be
drained through screw plugs.
9. Suspended installation
Due to formation of ice around the pump, the suspended
installation is preferred to foot mounting. This also allows
for easy access to service the conical filter and to installing
a condensate drip tray.
Consult Parker for ordering information.
Technical Information